Colorado Barbering Practice Exam

A honed razor is tested by passing it lightly over a moistened thumbnail. The reason why the other options are incorrect is because they do not provide the same level of delicacy and sensitivity as a thumbnail would. If the razor is sharp enough, it will easily glide over a moistened thumbnail without causing any pain or discomfort. Arm, paper, and fabric are all too thick or rough to provide an accurate test for a honed razor.